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  2. Kaolinite - Wikipedia

    en.wikipedia.org/wiki/Kaolinite

    Kaolinite (/ ˈ k eɪ. ə l ə ˌ n aɪ t,-l ɪ-/ KAY-ə-lə-nyte, -⁠lih-; also called kaolin) [5] [6] [7] is a clay mineral, with the chemical composition Al 2 Si 2 O 5 4.It is a layered silicate mineral, with one tetrahedral sheet of silica (SiO 4) linked through oxygen atoms to one octahedral sheet of alumina (AlO 6).

  3. Clay mineral - Wikipedia

    en.wikipedia.org/wiki/Clay_mineral

    Clay is a very fine-grained geologic material that develops plasticity when wet, but becomes hard, brittle and non–plastic upon drying or firing. [ 2 ] [ 3 ] [ 4 ] It is a very common material, [ 5 ] and is the oldest known ceramic .

  4. Plasticine - Wikipedia

    en.wikipedia.org/wiki/Plasticine

    Harbutt wanted a non-drying clay for his sculpture students. He created a non-toxic, sterile, soft and malleable clay that did not dry when exposed to air. Harbutt received a patent in 1899 and commercial production started at a factory in Bathampton in 1900. The original Plasticine was grey, but four colours were produced for initial sales to ...

  5. Clay - Wikipedia

    en.wikipedia.org/wiki/Clay

    Gay Head Cliffs in Martha's Vineyard consist almost entirely of clay. A Quaternary clay deposit in Estonia, laid down about 400,000 years ago. Clay is a type of fine-grained natural soil material containing clay minerals [1] (hydrous aluminium phyllosilicates, e.g. kaolinite, Al 2 Si 2 O 5 4).

  6. Clay chemistry - Wikipedia

    en.wikipedia.org/wiki/Clay_chemistry

    Clay chemistry is an applied subdiscipline of chemistry which studies the chemical structures, properties and reactions of or involving clays and clay minerals.It is a multidisciplinary field, involving concepts and knowledge from inorganic and structural chemistry, physical chemistry, materials chemistry, analytical chemistry, organic chemistry, mineralogy, geology and others.

  7. Ball clay - Wikipedia

    en.wikipedia.org/wiki/Ball_clay

    A ball clay mine in the UK. They are relatively scarce deposits due to the combination of geological factors needed for their formation and preservation. [6] Commercial extraction of ball clays is undertaken across the world, including: [7]

  8. Bentonite - Wikipedia

    en.wikipedia.org/wiki/Bentonite

    Bentonite layers from an ancient deposit of weathered volcanic ash tuff in Wyoming Gray shale and bentonites (Benton Shale; Colorado Springs, Colorado). Bentonite (/ ˈ b ɛ n t ə n aɪ t / BEN-tə-nyte) [1] [2] is an absorbent swelling clay consisting mostly of montmorillonite (a type of smectite) which can either be Na-montmorillonite or Ca-montmorillonite.

  9. Polymer clay - Wikipedia

    en.wikipedia.org/wiki/Polymer_clay

    Polymer clay is a type of hardenable modeling clay based on the polymer polyvinyl chloride (PVC). It typically contains no clay minerals, but like mineral clay a liquid is added to dry particles until it achieves gel-like working properties. Similarly, the part is put into an oven to harden, hence its colloquial designation as clay. [1]

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